Piezoelectric ceramic with relaxation type nanowire and preparation method thereof

A piezoelectric ceramic and nanowire technology, applied in the field of piezoelectric materials, can solve the problems of low power density, low sensitivity, and fragility, and achieve the effects of low raw material cost, sensitive piezoelectric response, and reduced array loss.

Active Publication Date: 2017-04-26
浙江巨力宝纺织科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the defects of low density, low sensitivity and brittleness of PbTiO3 piezoelectric ceramics prepared on a large scale at present, the present invention provides a piezoelectric ceramic with a relaxed nanowire, which is characterized by a piezoelectric ceramic with a perovskite structure. Relaxed ceramic nanowires are embedded in the electroceramic cake, which increases the array frequency and reduces the array loss. It has a sensitive piezoelectric response and is suitable for micro-vibration power generation.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) BaTiO 3 Slurry preparation: BaCO 3 and TiO 2 Weigh it according to the molar ratio of 1:1, grind it into a slurry with an appropriate amount of water in a colloid mill, and the grinding quality is based on the particle size being less than 100nm;

[0031] (2) Preparation of piezoelectric ceramics with a perovskite structure: weigh lead oxide, titanium dioxide, and zirconium dioxide at a mass ratio of 2:1:1, mix them with deionized water, ball mill for 5 hours, and then dry them at a pressure of 35MPa Pressed into a pancake with a thickness of 1.5mm by a hydraulic press, and sintered at 900°C to obtain a piezoelectric ceramic cake with a perovskite structure;

[0032] (3) Piezoelectric ceramic cake cracking: Cool the piezoelectric ceramic cake obtained in step (2) to 150°C, and quench it with liquid nitrogen to rapidly crack the ceramic cake, and further crack on the basis of the original cracks to form uniform micro-cracks;

[0033] (4) Formation of relaxed nanow...

Embodiment 2

[0036] (1) BaTiO 3 Slurry preparation: BaCO 3 and TiO 2 Weigh it according to the molar ratio of 1:1, grind it into a slurry with an appropriate amount of water in a ball mill, and the grinding quality is based on the particle size being less than 100nm;

[0037] (2) Preparation of piezoelectric ceramics with a perovskite structure: weigh lead oxide, titanium dioxide, and zirconium dioxide at a mass ratio of 1:1:1, mix them with deionized water, ball mill for 3 hours, and then dry them at a pressure of 10MPa Pressed into a 2mm pancake body and sintered at 900°C to obtain a piezoelectric ceramic cake with a perovskite structure;

[0038] (3) Piezoelectric ceramic cake cracking: Cool the piezoelectric ceramic cake obtained in step (2) to 150°C, and quench it with liquid nitrogen to rapidly crack the ceramic cake, and further crack on the basis of the original cracks to form uniform micro-cracks;

[0039] (4) Formation of relaxed nanowires: immerse the piezoelectric ceramic cake...

Embodiment 3

[0042] (1) BaTiO 3 Slurry preparation: BaCO 3 and TiO 2 Weigh it according to the molar ratio of 1:1, grind it into a slurry with an appropriate amount of water in a jet mill, and the grinding quality is based on the particle size being less than 100nm;

[0043] (2) Preparation of piezoelectric ceramics with a perovskite structure: weigh lead oxide, titanium dioxide, and zirconium dioxide at a mass ratio of 2:1:1, mix them with deionized water, mill them for 4 hours, and then dry them at a pressure of 50 MPa Pressed into a 1mm pancake body and sintered at 950°C to obtain a piezoelectric ceramic cake with a perovskite structure;

[0044] (3) Piezoelectric ceramic cake cracking: Cool the piezoelectric ceramic cake obtained in step (2) to 200°C, and quench it with liquid nitrogen to rapidly crack the ceramic cake, and further crack the original crack to form uniform micro-cracks;

[0045] (4) Formation of relaxed nanowires: immerse the piezoelectric ceramic cake with uniform c...

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Abstract

The invention relates to the field of a piezoelectric material, in particular to a piezoelectric ceramic with a relaxation type nanowire. The piezoelectric ceramic is characterized in that a relaxation type ceramic nanowire is embedded in a piezoelectric ceramic cake of a perovskite structure, so that the array frequency is improved; the array loss is reduced; the flexible piezoelectric response is realized; the piezoelectric ceramic is suitable for micro vibration electricity generation. Further, the invention relates to an advanced manufacturing method; by utilizing the characteristic that the piezoelectric ceramic of the perovskite structure has cracks in the sintering process, the cracks are further enlarged to be used as a template for forming the nanowire, so that BaTiO3 enters microcracks; the relaxation type nanowire is formed through crystalline grain growth along the cracks under the microwave condition. The cracks are repaired; in addition, the nanowire is formed; a better path is provided for large-scale preparation of high-response electricity generation materials.

Description

technical field [0001] The invention relates to a piezoelectric material, in particular to a piezoelectric ceramic with a relaxed nanowire, and further to an advanced manufacturing method. Background technique [0002] In recent years, people have been searching for new energy and renewable clean energy due to environmental problems. Therefore, the study of converting mechanical energy in the environment into electrical energy by using piezoelectric materials has received great attention. According to existing studies, experiments on piezoelectric materials have proved that piezoelectric materials can respond to various mechanical pressures and vibrations, thereby generating charges. This provides technical support for the application of piezoelectric materials in micromechanical energy generation. [0003] However, due to the limitations of material types, cost and performance, piezoelectric materials are mainly used in precision drive and sensing, microelectronics manufa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/87
CPCC04B41/009C04B41/5041C04B41/87C04B35/491C04B41/4539C04B41/0072
Inventor 陈庆曾军堂
Owner 浙江巨力宝纺织科技有限公司
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